The Motherlode, Excavator is a rare Legendary Artifact Creature — Robot card from Fallout (PIP), collector number 62. Current market price: $0.30 (foil $0.62), TCGplayer market prices via Scryfall.
When The Motherlode enters, choose target opponent. You get an amount of {E} (energy counters) equal to the number of nonbasic lands that player controls. Whenever The Motherlode attacks, you may pay {E}{E}{E}{E}. When you do, destroy target nonbasic land defending player controls, and creatures that player controls without flying can't block this turn.